Table 2. Direct Band Gap (eV) at the K-Point of Materials Using PBE and HSE06 Functionals.
| materials | material type | structure | Eg (using PBE) | Eg (using HSE06) |
|---|---|---|---|---|
| WS2 | monolayer | hexagonal (2D) | 1.83 | 2.78 |
| WSSe | Janus monolayer | hexagonal (2D) | 1.72 | 2.15 |
| WSTe | Janus monolayer | hexagonal (2D) | 1.23 | 1.71 |